HMF is a product of the maillard reaction (aka browning food)

it's mutagenic as well. (not sure if its more or less toxic than gasoline)

It could be fuel source, but this is basically a direct conversion of sugars into a fuel. We all know about where this is going. The wiki says that cellulose and starch can be used, but breaking down cellulose is still the big problem. (seriously if we could break down cellulose efficiently it would be nice!)

furthermore the wiki on furalfural notes it explosively decomposes above 250C. it's also pretty toxic.

Thanks, I read the wiki articles. I was hoping RR knows more about the subject than WikiPedia. And is willing to write about it.